2023
Radiomic markers of intracerebral hemorrhage expansion on non-contrast CT: independent validation and comparison with visual markers
Haider S, Qureshi A, Jain A, Tharmaseelan H, Berson E, Zeevi T, Werring D, Gross M, Mak A, Malhotra A, Sansing L, Falcone G, Sheth K, Payabvash S. Radiomic markers of intracerebral hemorrhage expansion on non-contrast CT: independent validation and comparison with visual markers. Frontiers In Neuroscience 2023, 17: 1225342. PMID: 37655013, PMCID: PMC10467422, DOI: 10.3389/fnins.2023.1225342.Peer-Reviewed Original ResearchIndependent validation cohortIntracerebral hemorrhageRadiomic featuresValidation cohortClinical variablesHematoma expansionSpontaneous supratentorial intracerebral hemorrhageNon-contrast head CTSupratentorial intracerebral hemorrhageTomography (CT) of patientsNon-contrast headFuture clinical trialsNon-contrast CTIntracerebral Hemorrhage ExpansionHigh predictive valueBAT scoreHypertensive patientsClinical predictorsPrognostic relevanceFunctional outcomeClinical trialsHead CTHemorrhage expansionClinical trial datasetDiscovery cohort
2016
Prominent cortical and medullary veins on susceptibility-weighted images of acute ischaemic stroke
Payabvash S, Benson JC, Taleb S, Rykken JB, Hoffman B, Oswood MC, McKinney AM. Prominent cortical and medullary veins on susceptibility-weighted images of acute ischaemic stroke. British Journal Of Radiology 2016, 89: 20160714. PMID: 27805839, PMCID: PMC5604931, DOI: 10.1259/bjr.20160714.Peer-Reviewed Original ResearchConceptsAcute ischemic strokeLarger infarct volumesMedullary veinsIschemic strokeInfarct volumeArterial occlusionSusceptibility-weighted imagesConsecutive patientsClinical outcomesCortical veinsProminent cortical veinsPosterior circulation territoryPoor clinical outcomeSeverity of symptomsFair interobserver agreementSWI seriesAcute strokeSymptom onsetIndependent predictorsClinical variablesSWI scansPatientsStrokeImaging implicationsProminent veins
2013
Variable Selection and Prediction Using a Nested, Matched Case-Control Study: Application to Hospital Acquired Pneumonia in Stroke Patients
Qian J, Payabvash S, Kemmling A, Lev MH, Schwamm LH, Betensky RA. Variable Selection and Prediction Using a Nested, Matched Case-Control Study: Application to Hospital Acquired Pneumonia in Stroke Patients. Biometrics 2013, 70: 153-163. PMID: 24320930, PMCID: PMC3954429, DOI: 10.1111/biom.12113.Peer-Reviewed Original ResearchConceptsMassachusetts General HospitalCase-control studyStroke patientsAcute ischemic stroke patientsBrain regionsMatched Case-Control StudyHospital-Acquired PneumoniaIschemic stroke patientsLarge prospective studiesUnconditional logistic regressionCase-control designSpecific brain regionsAcquired PneumoniaAcute infarctionClinical featuresProspective studyClinical variablesGeneral HospitalEpidemiologic studiesPatientsModern imagingLarger studyLogistic regressionAppropriate statistical analysisHAP studiesHospital Acquired Pneumonia Is Linked to Right Hemispheric Peri-Insular Stroke
Kemmling A, Lev MH, Payabvash S, Betensky RA, Qian J, Masrur S, Schwamm LH. Hospital Acquired Pneumonia Is Linked to Right Hemispheric Peri-Insular Stroke. PLOS ONE 2013, 8: e71141. PMID: 23951094, PMCID: PMC3737185, DOI: 10.1371/journal.pone.0071141.Peer-Reviewed Original ResearchConceptsHemispheric infarctsBrain regionsConsecutive acute stroke patientsConditional logistic regression modelsHospital-Acquired PneumoniaRight hemispheric infarctAcute stroke patientsInsular cortex volumeVolume-based variablesSpecific brain regionsLogistic regression modelsAcquired PneumoniaControl patientsMajor complicationsBrainstem strokeImmune suppressionInfarct sizeStroke patientsAutonomic modulationClinical variablesAdmission imagingInfarct locationUnivariate analysisImmune mechanismsCortex volume
2012
Malignant CTA Collateral Profile Is Highly Specific for Large Admission DWI Infarct Core and Poor Outcome in Acute Stroke
Souza LC, Yoo AJ, Chaudhry ZA, Payabvash S, Kemmling A, Schaefer PW, Hirsch JA, Furie KL, González RG, Nogueira RG, Lev MH. Malignant CTA Collateral Profile Is Highly Specific for Large Admission DWI Infarct Core and Poor Outcome in Acute Stroke. American Journal Of Neuroradiology 2012, 33: 1331-1336. PMID: 22383238, PMCID: PMC3888794, DOI: 10.3174/ajnr.a2985.Peer-Reviewed Original ResearchConceptsDWI lesion volumeLesion volumeDWI volumeNIHSS scorePoor outcomeHigher median NIHSS scoresROC analysisDWI lesion sizeLarger DWI volumeMedian NIHSS scoreAcute stroke treatmentAdmission NIHSS scoreOnly independent predictorPoor functional outcomeIntracranial ICA occlusionCTA collateralsAcute strokeICA occlusionProximal occlusionIndependent predictorsStroke treatmentInfarct sizeClinical variablesFunctional outcomeInfarct core